<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: BrowserCheckBehavior.class.php 2616 2012-01-16 08:36:46Z liu21st $


class BrowserCheckBehavior extends Behavior {
	protected $options = array ('LIMIT_REFLESH_TIMES' => 10 );
	public function run(&$params) {
		if ($_SERVER ['REQUEST_METHOD'] == 'GET') {
			//	启用页面防刷新机制
			$guid = md5 ( $_SERVER ['PHP_SELF'] );
			// 检查页面刷新间隔
			if (Cookie::is_set ( '_last_visit_time_' . $guid ) && Cookie::get ( '_last_visit_time_' . $guid ) > time () - C ( 'LIMIT_REFLESH_TIMES' )) {
				// 页面刷新读取浏览器缓存
				header ( 'HTTP/1.1 304 Not Modified' );
				exit ();
			} else {
				// 缓存当前地址访问时间
				Cookie::set ( '_last_visit_time_' . $guid, $_SERVER ['REQUEST_TIME'], $_SERVER ['REQUEST_TIME'] + 3600 );
			
		//header('Last-Modified:'.(date('D,d M Y H:i:s',$_SERVER['REQUEST_TIME']-C('LIMIT_REFLESH_TIMES'))).' GMT');
			}
		}
	}
}